Fuel injection pump



Dec. 25, 1956 c. F. HIGH FUEL INJECTION PUMP Filed Nov. 24. 1953 mmwmagnumm INVENTOR GATE L. F HIG H United States Patent FUEL INJECTION PUMP Carl F. High, Detroit, Mich., assignor to American Bosch Arma Corporation, a corporation of New York Application November 24, 1953, Serial No. 394,058

3 Claims. (Cl. 103-2) This invention relates to fuel injection apparatus and has particular reference to a new and improved fuel injection pump which is relatively simple, compact and economical in construction and efiicient in operation.

An object of the invention is to'provide a relatively simple and inexpensive fuel injection pump of the distributor type.

Another object is to provide a fuel injection pump of the type set forth having improved means for controlling the fuel quantity.

Another object is to provide new and improved fuel metering means for fuel injection apparatus.

Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawing. It will be understood that changes may be made in the details of construction and arrangement of parts, as the preferred form has been given by way of illustration only.

Referring to the drawing:

Fig. l is a side view of a fuel injection pump embodying the invention;

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1;

Fig. 3 is an end view thereof taken from the drive end;

Fig. 4 is an end view thereof taken from the end opposite the drive end; and

Fig. 5 is a fragmentary sectional view on an enlarged scale showing the fuel metering means.

Referring more particularly to the drawing wherein similar reference characters designate corresponding parts throughout, the fuel injection pump of the present invention comprises a two part housing having sections and 11 secured together by bolts or other suitable means.

The aligned housing sections have a bore therethrough and in this bore is positioned the pumping and distributing member 12 having the face cam 13 and the splined drive end 14.

In the pumping and distributing portion 12 is the axial bore 15 which has one end 16 opening into the pumping chamber and the radial port 17 adjacent its opposite end adapted to communicate with outlet ports 18 successively upon rotation of member 12.

The housing section 10 is provided with the inlet 19 adapted to be connected to a fuel supply from a supply tank or supply pump and which communicates with the pumping chamber through port 20 and metering valve 21.

Metering valve 21 is positioned within the bore and communicates through duct 22 with radial intake ports 23 in member 12.

In Fig. 2 port 17 is shown in the same plane as intake ports 23. This showing is for the purpose of illustration only as these ports will not be in the same plane.

Metering valve 21 is mounted for pivotal movement within said bore by means of operating lever 24 and shaft 25 and valve 21 is retained in position by annular threaded member 26 through which shaft 25 extends.

Metering valve 21 has the substantial V shaft metering groove 27 in its periphery with the open end thereof communicating with inlet port 19 and said V groove being adjustable relative to port 22:: which communicates with duct 22 whereby the fuel quantity may be controlled.

Housing section 11 has the roller 28 mounted for rotation 0n pivot pin 29. Roller 28 is adapted to engage face cam 13 and effects movement thereof upon engage+ ment of cam lobes 13a and thereby efiects reciprocation or pumping action of member 12.

The return stroke of the pumping and distributing member is effected by return spring 30.

The plunger is provided with the leak ofi groove 31 and return duct 32 which returns any leakage fuel back to the inlet port 20. i

The splined drive end 14 is adapted to be connected to the engine in the usual manner.

In operation, the pumping and distributing member are continuously rotated and intermittently reciprocated and thereby effects pumping and distributing of fuel which is received through inlet 19 and port 20 and the fuel quantity which is controlled through metering valve 21 passes through port 22a, duct 22 and each of the radial ports 23, in sequence, to the axial. bore 15 from which it passes into the pumping chamber between the metering valve 21 which is in the same bore and the adjacent end of member 12.

The pumping stroke of member 12 is effected by roller 28 and each of lobes 13a on face cam 13 and upon engagement of each of said lobes with said roller, the pumping stroke is made and the face cam 13 is retained in engagement and returned on its suction stroke by means of spring 30.

Upon rotation of member 12 distributing port 17 is successively aligned with each of outlets 18 which are respectively connected by pipe lines to their respective combustion chambers which are adapted to receive fuel from the pump.

It will be seen that by adjustment of the metering valve 21 that the quantity of fuel can be easily and quickly varied and further that with said metering valve 21 and pumping and distributing member 12 is aligned relation in a single bore that relatively simple, compact and inexpensive construction is provided.

From the foregoing it will be seen that I have provided simple, compact and economical and efficient means for obtaining all of the objects and advantages of the invention.

I claim:

1. In a device of the character described, a housing having a bore, a fuel inlet communicating with said bore for supplying fuel thereto, a pumping and distributing member mounted for reciprocation and rotation in said bore in said housing, said pumping and distributing member having a bore, port means for supplying fuel to said bore in said pumping and distributing member, said pumping and distributing member having a distributing port communicating with said bore in said pumping and distributing member, a plurality of outlets in said housing communicating with said bore in said housing and adapted to deliver fuel to each of said plurality of outlets successively upon rotation of said pumping and distributing member and a metering valve member for controlling the quantity of fuel supplied to said bore from said inlet, said valve member being in said bore in said housing and in alignment with said pumping and distributing member, and a fuel passage connecting said metering valve to said bore in said housing between said valve and said pumping and distributing member. a

2. In a device of the character described, a housing having a bore, a fuel inlet communicating with said bore for supplying fuel thereto, a pumping and distributing 3 member mounted vfor reciprocation and rotation in said bore in said housing, said pumping and distributing memher having a bore, port means for supplying fuel to said bore in -said pumping :and distributing member, said pumping and-distributingmember having-a distributing :portzcommunicating with saidborein said pumping and .distributing member and adapted to deliver fuel to a plurality .of outlets successively -:upon rotation of said pumping anddistributing member and a metering valve member forcontrolling ithe quantity-of fuel supplied to said-borefrom said inlet, said valve member comprising a rotary adjustable member in said bore and having a substantial V shaped metering groove in the fuel path to said bore in said housing'anda fuel passage connecting said metering valvetosaidboreiin said housingbetween said valve and said pumping and distributing member.

3. In a device of the character described, a housing fhavinga :bote,;a fuel inlettcommunicating with said bore for supplying fuel thereto, a pumping and distributing member mounted. for reciprocation and rotation in said bore in said housing, said pumping and distributing member having-a bore, vport means for supplying fuel to said bore in said pumping and distributing member from References Cited in the file of this patent UNITED STATES PATENTS 2,223,759 Dillstrom Dec. 3, 1940 2,365,636 Hedges Dec. 19, 1944 2,582,535 Drouot Jan. 15,, 1952 2,642,806 Berlyn June 23, 1953 2,679,804 Bischofi June 1, 1954 

